package com.itheima.kafka_demo.test;

import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.clients.consumer.ConsumerRecords;
import org.apache.kafka.clients.consumer.KafkaConsumer;

import java.util.Collections;
import java.util.Properties;

/**
 * 消费者
 */
public class ConsumerQuickStart {
    public static void main(String[] args) {
        // 1.设置消费者配置信息
        Properties properties=new Properties();
        properties.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG,"192.168.200.130:9092");
        // 2.设置消费者组
        properties.put(ConsumerConfig.GROUP_ID_CONFIG, "group2");
        //消息的反序列化器
        properties.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringDeserializer");
        properties.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringDeserializer");
        // 创建消费者
        KafkaConsumer<String,String> consumer=new KafkaConsumer<String, String>(properties);
        //订阅主题
        consumer.subscribe(Collections.singletonList("itheima-topic"));
        // 3.消费消息
        while (true) {
            ConsumerRecords<String, String> poll = consumer.poll(1000);
            for (org.apache.kafka.clients.consumer.ConsumerRecord<String, String> record : poll)
            {
                System.out.println(record.value());
                System.out.println(record.key());
            }
        }

    }


}
